package edu.ctbu.labtest.webapi;


import edu.ctbu.labtest.domain.Student;
import edu.ctbu.labtest.service.StudentService;
import edu.ctbu.labtest.util.PageUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.*;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/webapi/student")
public class StudentRestController {

    @Autowired
    private StudentService studentService;

    /**
    * 读取的url:/webapi/student/list
    * @return
    * */
    @GetMapping("/list")
    public List<Student> getAll(){
        List<Student> students = studentService.findAll();
        return students;
    }

    /**
     * 分页，读取全部内容
     * @return
     */
    @GetMapping("/getByPage")
    public PageUtils getByPage(@RequestParam(value = "page", defaultValue = "0") Integer page,
                               @RequestParam(value = "size", defaultValue = "10") Integer size,
                               @RequestParam(value = "name", defaultValue = "") String name){

        //按id拍倒序
        Sort sort = Sort.by(Sort.Direction.DESC,"id");

        Page<Student> studentPage;

        if (StringUtils.isEmpty(name)){
            Pageable pageable = PageRequest.of(page,size,sort);
            studentPage = studentService.findAll(pageable);
        }
        else {
            Student student = new Student();
            student.setName(name);

            Pageable pageable = PageRequest.of(0,10,sort);

            ExampleMatcher matcher = ExampleMatcher.matching()
                    .withMatcher("name",ExampleMatcher.GenericPropertyMatchers.contains());//全部模糊查询，即%{name}%
            Example<Student> example = Example.of(student,matcher);

            studentPage = studentService.findAll(example,pageable);
        }
        PageUtils pageUtils = new PageUtils(studentPage.getContent(),studentPage.getTotalElements());

        return pageUtils;
    }

    /*通过id获取学生*/
    @GetMapping("/get/{id}")
    public Student get(@PathVariable Long id){
        Student student = studentService.getById(id);
        student.setPassword("");
        return student;
    }

    /*新增学生的方法*/
    @PostMapping("/insert")
    public Student insert(Student student){
        Student student1 = studentService.insert(student);
        return student1;
    }

    /*更新学生的方法*/
    @PutMapping("/update")
    public Student update(Student student){
        //读取旧的数据
        Student oldStudent = studentService.getById(student.getId());

        if (StringUtils.isEmpty(student.getPassword())){
            //没有新密码，那么就是旧密码
            student.setPassword(oldStudent.getPassword());
        }

        student = studentService.update(student);
        return student;
    }

    /*删除学生的方法*/
    @DeleteMapping("/delete/{id}")
    public void delete(@PathVariable Long id){
        studentService.delete(id);
    }
}
